高一下期末數(shù)學(xué)試卷及答案

5logmlogn4mn33434B．9D2n1nN，nnaa=*SSnnnn7B89D8x97202a、b．a(chǎn)=8b=．a(chǎn)=4b=9．a(chǎn)=1bD．a(chǎn)=1bD2acosBcC112aaaaaa，n74a2．33232232B．．或D233(abcbca)A．B．．D．a(chǎn)，a3a3a2nN（*11nnn．a(chǎn)aB．a(chǎn)a．a(chǎn)aD．a(chǎn)a10%．4．510(1.11)11(1.11)．．65(x,y)|xa,yba、Pb242D．2B．465lg(12xx)y22a3(nN)a5ans*nnn2xy2x、yxy1z23xyxy1個(gè)113是a、b=，、bka1b4'S、Sa11nnkknn'abkS+Skkkk5cosBb中，a,b,cB是CScosC2ac53a，Sbaa,a,an237an2bnnbsannn(x)ax(b8)xaabx(f(x)0；19f2x(,(2,)f(x)0yf(x)cax2c0ABCD1111ABCD41111xxS(x)ABS11ABCD1111DC4米14米AB10米10米x00yDDnnyn(n)(nN)f*,f(2)f(n)fTf(n)f(n1)T與TnTm2nnn1nnmS12,ntSbnbf(n)nnSnnnn1n1,tn1D2A3B4B5C6C7A8C9DBx46x34；5cosBcosCbcosBsinB2sinAsinC2accosC2sinAcosBcosBsinCsinBcosC2sinAcosBsinBcosCcosBsinC4ABBC)ABA123cosB,又0BB,82113aS5有SBcc5⑵2223bac2Bb245b222224a6d1013(a2d)(ad)(a6d)2111520a2a或1153dd5naaa72nn1n58b4nn18)n814nS1828n525522當(dāng)abSn22nnn815nS2nnS或2n(f(x)0x(,(2,)；f(x)0xax(b8)xaab02b832a3a6a5b32af(x)3x3x18（820yaxbxca23x25xc00252512c0c即1225ax2c0c時(shí)124000xBCAB1111x4000S(x20)(8)x8000041608x(x0)6x8x28x⑵Sxx800008x即x100xABCD1111(1)f6f21y2n2n當(dāng)x當(dāng)x∴f2ynn(n)n2nn49(n1)(n2)f(n)f(n1)9n(n1)n2T2n19n(n1)⑵Tn12n2n2nTnn2n1,2TT當(dāng)n當(dāng)n∴nn1n3n22nTT8n1n1T91272nTT23n4TTn3272T∴T中的最大值為Tn23272272Tmnnmm∴8)8n228S⑶b()fn3nnn187nn87878t8nS171將SnnnS12t8n1n1n788n